Reds. Russets. Yukon Golds. Up until about a year or so ago, you could throw together a pretty decent breakfast after frying up a potato, some onions, and parsley for home fries. And you didn't have to do anything more to the potato than wash it and slice or chop it up. Not anymore. The spuds for sale at WalMart or Publix for five and six bucks a bag look like the real thing, but wait until you try to cook them. The problem is, they won't. Or don't. You can fry them all you want. Yet they'll stay raw...